I'll resurrect this thread and vouch for the Orbi.
I'm not a tech guy.
I have 250 mbps service and a two-story home that's right at 3,000 sqft. I found a Cyber Monday deal and upgraded my cable modem to a Netgear CM700 from the old one that my service provider gave me. I also picked up an Orbi (RBK23) at the same time. The RBK23 isn't as powerful as the RBK53 and doesn't have as many LAN/WAN ports, but it fit my needs.
My house is U-shaped and getting good speeds everywhere has been tough, especially outside on our large covered porch (inside the "U").
Using an assortment of power line extenders and range extenders, speeds into the house would run about 80-100 mbps wired directly into the combo router/modem on off-peak usage times and about the same inside my office via wifi a few feet away. Step around the corner into the living room, and speeds dropped about 30-40%. In the bedrooms, speeds were 60-70% lower. Outside, was rough...about 75-80% loss and pretty weak connections.
After installing everything last night at around 8pm, I was getting 100+mbps everywhere I went. There was only a little drop off outside where speeds were 83.6 mbps...but that is plenty fast for Roku streaming on the porch, music, iPad, etc. No hopping among different bands and different networks to find the one with the best speed. It was great. Early this morning, I was getting 200+ mbps in my office and 150+ mbps everywhere else.
Setup was ridiculously easy and all done through an app on my phone. I know there are probably better options out there. But if any of you non-techies are looking for better wifi in your home, I'd really recommend the Orbi.